Datsman

OK, I did change out the tire sizes, I now have 26-1/2", 29" and 31" tires and tested them all. Found that it does make a big difference between the 26-1/2" and the 31" tires for low end torque. I have settled I think for now on 29" tires. I have changed an 18" section of my exhaust and made a 1-7/8" insert in the 2-1/4" which also made more low end torque. But it still does not have the lower end power that I thought I would get. The top end is great, High rev's and RPM are not a problem. Once underway it has good power but still from zero up not what I was thinking. After discussing the problem with a few people I am told that I should swap to a L16 head for smaller ports which would give me more low end torque. Has anyone doen this swap on a L20b block and is it possible to create more low end power with this combination?

OK I bought new Stock 27-1/2" tires and put them on the old rim's. It did make a difference but still not what I was looking for. I am considering puting a toyota front and rear in it has anyone done this swap? If you have what year did you put in and was there much difficulty in the swap.

Ok, I was told that the 500 CFM with the cam that I have was a match made in heaven. Well it appears that it is not true so does the weber DGV 32/36 fit on the stock manifold? If so where is the best place for me to purchase one weber carb.(EBAY)? I will change out the tire size and see if that make a big difference. I didn't think that going from a 27" to a 31" would make such a big diffrence. We had this tire size on my sons 1981 and it ran just fine. I was wondering if it is all because of the carb is to big. Note: that I will change the exhaust after I have tried a few of the other suggestions. I have had this truck for many years and want to restore it to its glory, not many of them 1980's left anymore. This one was fully loaded power steering, Air Conditioning, Etc. the works. Any help that I can get will be much appreicated.

OK, do you think that changing the exhaust system to say 1-3/4" with a restrictive muffler would make the difference? Or so I need to get a smaller tire set? Seems like I have to do a major toyota front and rear end swap to get what I am looking for.... can this be true or false?

Yes it has a stock Brog-Warner 5 speed transmision and I believe the gears are around the 4:30 Range.

I am told by mklotz70 that a person named Datsunaholic is the master about the 720 series pickup trucks. This is the problem I have a completely restored motor with a kinda wild cam in it. The exhaust is a 2-1/4" with cat and flowmaster. The suspension is all stock but has 31" tires on it. Well I do not have the power that I was looking for I am told that it is because of the tires by one person and then by another it is the exhaust so not have enough back pressure. I tried to buy a new set of gears to no avail. then I tried to buy a rear end out of a older truck with a lower gear set which I did but found out during the swap that the splines are wrong. If any one out there especially the Datsunholic please send some advise on the project. I also have a 500 CFM carb, MSD 6al box and new MSD distruibutor. I am at a total loss for which way to jump.:confused::confused: